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AT77C104B bảng dữ liệu(PDF) 13 Page - ATMEL Corporation

tên linh kiện AT77C104B
Giải thích chi tiết về linh kiện  FingerChip Thermal Fingerprint Sweep Sensor, Hardware Based, Navigation and Click Function, SPI Interface
PDF  36 Pages
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nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
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AT77C104B
5347B–BIOM–08/04
Modectrl Register
Register Name:Modectrl (7 bits)
Access Type:Read/Write
Function:Mode control
•
MODE: select operating mode
0000: standby
0001: test (reserved for factory use)
0010: click
0100: navigation
1000: acquisition
Certain changes can be made. For example, MODE can be set to 0b0110 to activate
click and navigation.
•
ANALOGRST: reset local oscillator
0: oscillator in active mode
1: oscillator in power-down mode
Notes:
1. Click or navigation modes cannot be used when the local oscillator is switched off. .
2. To return to standby mode and stop the oscillator (to save on power consumption),
two Modectrl register accesses are
necessary: the first one to select standby mode and the second to switch off the
oscillator.
3. The read-only registers cannot be read when the oscillator is turned off.
4. To shift between navigation and acquisition modes, you must be in standby mode
(Modectrl = 0b00001).
If modes such as “acquisition and click” or “acquisition and navigation” are programmed
together, they will be ignored by the system.
With x = 0 or 1.
b6
b5
b4
b3
b2
b1
b0
MODE (MSB)
MODE
MODE
MODE (LSB)
ANALOGRST
–
–
000
0100
Programmed Mode
Register Value
11xx
01xx
1x1x
0x1x



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